If the owner had 2 guys that couldn't get it right, and came back to you, and you were the one who implemented menus and specials, it sounds like you have it together, but are unsure if you want to pursue this.
This is your decision alone. Sounds like you know what to do.
-I don't know if I'm anywhere close to being experienced enough to run a full setup like that, let alone with competence.
-I don't know if I'm ready to commit the next 5-10 years of my life to...